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Structural variations induced by thermal treatment in lead feldspar (PbAl2Si2O8)
Structural variations thermal treatment lead feldspar
2012/3/30
Lead feldspar single crystals were annealed at T 5 1050 and 1000 8 C, starting from a disordered metastable configuration (PbFH, Qod5 0) and from an ordered configura-tion (PbFL, Qod5 0.89). Single-cr...
Structural Variations in Chlorite and Illite in a Diagenetic Sequence from the Imperial Valley, California
Chlorite Diagenesis High-gradient magnetic separation Illite Interstratification Polytype X-ray powder diffraction
2012/1/4
Samples of cuttings from the Borchard A-2 well, Imperial Valley, California, were collected over a measured borehole temperature interval 135° to 275°C. The <0.5-µm (e.s.d.) fraction was separat...
Compositional and Structural Variations in the Size Fractions of a Sedimentary and a Hydrothermal Kaolin
Dickite Halloysite Infrared spectroscopy Kaolinite Particle size Thermal analysis Scanning electron microscopy X-ray powder diffraction
2012/1/11
The 16-8-, 8-5-, 5-2-, 2-1-, 1-0.5-, 0.5-0.3-, 0.3-0.1-, and <0.1-祄 size fractions were centrifuged from a Georgia (U.S.A.) sedimentary kaolin and a hydrothermal kaolin from the Sasso mine (Italy) and...